Претраживање
Приказ резултата 11-20 од 124
Kreiranje morfologije i veličine čestica ZnO prahova
(Beograd : Savez inženjera i tehničara Srbije, 2012)
U ovom tekstu objašnjeni su postupci sinteze prahova ZnO i mogućnosti da se tim sintezama morfologija i srednja veličina čestica kreiraju od mikrometarskih štapića do nanometarskih sfernih čestica. Primenjene su dve metode ...
Partitioning and purification of cellulases in aqueous two-phase system
(Tatranské Matliare : Slovak Society of Chemical Engineering, 2012)
Aqueous two-phase systems can be formed by mixing the solutions of two mutually incompatible polymers or polymer and salt above critical concentrations and represent media that are very well suited for the separation and ...
Phase and microstructural evolution during sintering of Zr-doped hydroxyapatite
(Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade, 2012)
Doping of hydroxyapatite crystal structure with various ions is generally performed to improve biological, electrical, optical and mechanical properties of initial system. In this study, hydroxyapatite nanopowders doped ...
Structural and magnetic properties of mechanochemically synthesized nanosized yttrium titanate
(Belgrade : Association of the Chemical Engineers of Serbia, 2012)
Nanosized perovskite YTiO3 with the mean crystallite size of 18 nm was synthesized for the first time by mechanochemical treatment. The mechanochemical solid state reaction between commercial Y2O3 powder and mechanochemically ...
Contemporary Dental Ceramics
(Belgrade : Serbian Ceramic Society, 2012)
The aim of this study was to provide an overview of evolution of ceramic systems and future perspectives related to computer-aided design and computer-aided manufacturing (CAD/CAM) technology. Dental ceramics were introduced ...
Up-converting characteristics of Y203:Yb/Er nanocrystalline powders obtained through spray pyrolysis
(Beograd : Tehnološko-metalurški fakultet Univerziteta u Beogradu, 2012)
Sub-micronic, spherical Y203:Yb/Er particles comprising clustered nano-units were prepared through ultrasonic spray pyrolysis of pure nitrate precursor solutions that contain different Yb/Er dopants ratio (10, 5 and 2). ...
Synthesis and characterization of LiFePO4/C composite obtained by cellulose template
(Belgrade : Materials Research Society of Serbia, 2012)
In the on-going search for alternative cathode materials for Li-ion batteries olivine-type lithium iron phosphate (LiFePO4) is one of the most promising candidates due to its high energy density (with theoretical capacity ...
Hydroxyapatite and hydroxyapatite substituents in strengthening of the jaw bone tegmenta
(Belgrade : Materials Research Society of Serbia, 2012)
In recent years, calcium hydroxyapatite (HAp) and its substituents are increasingly used in dentistry and medicine. The influence of nanoparticles Ca / Co-HAp in strengthening weak osteoporotic bone jaw tegmenta was tested ...
Study of Dielectric Behavior and Electrical Properties of Hematite a-Fe2O3 Doped with Zn
(Belgrade : Serbian Ceramic Society, 2012)
The effects of Zn-doping on the dielectric behavior and electrical properties of bulk alpha-Fe2O3 have been studied. X-ray diffraction analysis revealed the presence of two phases in all samples: hematite and spinel ZnFe2O4, ...
Effects of different cryoprotectants on morphology of lyophilized poly(ε-caprolactone) micro and nanospheres
(Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade, 2012)
A common limitation of using polymeric micro and nanoparticles in long-term conservation is due to their poor physical and chemical stability. Freeze-drying is one of the most convenient methods that enable further ...